They have an on line shop
Printable View
Topographical maps are available at Wollombi Real Estate.
Check out this local from the region...
http://www.abc.net.au/news/2014-10-0...castle/5786950
I've got mine from various places like newsagents, BCF, and online.
Try HEMA Barrington Tops & Wollemi National Parks map, and Dept of Lands GDA Barrington Tops 9133-1N, Moonan Brook 9134-2S, Gloucester Tops 9233-4N, and also CMA (Central Map Authority) Waverly 9134-3-S. These are all 1:25000 scale
Also the map from NPWS Barrington Tops is handy but very limited.
I think the best 4WD tracks are on the opposite corner from you at Chichester. Definitely more scenic up your way though.